Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d55ef09f4eac6a…

MALICIOUS

PDF

51.7 KB Created: 2020-10-26 22:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5dc813767e77be9e5caf1801dc64820b SHA-1: 0e437b816ce58a50697a941275782d455b42015c SHA-256: 25d55ef09f4eac6ab6e27f5876ea737e4240be8716e776d81012f6c1ccd4504f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to known malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains a URL that matches the redirector. This suggests the file is designed to lead users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/123?keyword=anti+bullying+quotes+from+celebrities In PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/velowo_dakemolaku.pdfIn PDF document text
    • https://jilukixewe.weebly.com/uploads/1/3/4/0/134042659/cdb8024f5a69.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/5695812.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/47292360a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414495/normal_5f95b778c42f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f87a32df4165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f8745e4b91a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f8a0d6a5af07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f89e134b13c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5f96b7a97b0cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_5f89085009abd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/bed68cc4-770f-456b-9d1a-3d8a78081420/lumetedalosafafuzujetufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/383cc751-b8cd-4f86-9d23-0bc7e17c9f7e/flower_quest_hollow_knight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/002b6107-7d49-48d5-9e58-6efda1a909ac/chaos_knights_40k_codex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4585/8711/files/at_what_temperature_does_parchment_paper_burn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/90581107420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1979/2294/files/graco_snugride_35_car_seat_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/biology_ssc_important_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/passport_photo_template.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/3200948174.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000796e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796E 5228 bytes
SHA-256: e4d4395ff0809fc314b4faf8901743c2386a5bdeccda55838e2b75fd940f6ac1
font_01_sfnt_off00008b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B29 11112 bytes
SHA-256: 0b49eb93bb3461eea497afe15030e979d5f72875ad3484c3084b297a2a048b63
font_02_sfnt_off0000b0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0FB 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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